Is the CDC Ignoring Science When it Interferes with a Cozy Relationship?

When does collaboration cross the line into research misconduct? And why is it bad for public policy, cats, and people care about both of them?

Back in August of 2013, I wrote a post asking whether the Centers for Disease Control and Prevention was doing the American Bird Conservancy’s bidding. As should be obvious, the question was intended to be provocative. As it turns out, though, it was also more than a little prescient.

Documents obtained through Freedom of Information Act requests reveal a pattern of questionable behavior from CDC epidemiologist Jesse Blanton, whose cozy relationship with various ABC staff resulted in the publication—and extensive promotion—of a paper that’s become one of the go-to tools in TNR opponents’ arsenal (see Note 1).

And yet, despite its glaring flaws and dubious origins—which together raise serious questions about research misconduct—both the CDC and John Wiley & Sons (publisher of Zoonoses and Public Health, the journal in which the paper appeared) have been eager to dismiss concerns over this poster-child for publicly funded junk science. Read more

Rabies in Cats Continues to Decline

Well, this must be awkward—for some, anyhow. In particular, the people who continue to overstate the threat of rabies, leveraging whatever fear they can muster in their ongoing campaign to undermine community cat programs and TNR efforts.

Awkward or not, though, it’s a fact: the number of cats testing positive for rabies in the U.S. declined for the second year in a row.

The 2013 data, compiled by the Centers for Disease Control and Prevention and published November 15th in the Journal of the American Veterinary Association, show a decline of 10 cases (3.9 percent) from the 257 cases reported in 2012—which represented a rather dramatic decline of 15.2 percent from 2011’s total of 303 cases. Read more

Montgomery County, VA: Then and Now

In answering one question, other more interesting questions sometimes emerge. That’s exactly what happened when I followed up on a claim made in “Rabies Prevention and Management of Cats in the Context of Trap-Neuter-Vaccinate-Release Programmes,” recently published in Zoonoses and Public Health (and critiqued in some detail in my August 3rd post).

As evidence of both the threat of free-roaming cats and the need for lethal roundups, the authors—five from the Centers for Disease Control and Prevention, one from the U.S. Department of Agriculture, and the other, George Fenwick, president of the American Bird Conservancy*—cite a 1992–1996 study of Montgomery County, VA, rabies exposure reports.

“Most striking, a study in Montgomery County, VA, attributed 63 percent of [post-exposure prophylaxis] recommendations to stray cat exposures compared with only 8 percent for wild animal contact. In this community, the high rate of PEP due to cats resulted in part from the lack of a county animal shelter facility for cats, illustrating the need for removal of feral and stray cats as a means of rabies control and PEP reduction.” [1]

A review of the work cited confirms that, indeed, 24 of 38 exposures requiring PEP (63 percent) over the course of the 55-month study period were related to stray and feral cats. [2] So far, so good. Read more

CDC Doing the American Bird Conservancy’s Bidding?

Representatives of the Centers for Disease Control and Prevention sign on to the American Bird Conservancy’s witch-hunt against free-roaming cats, misrepresenting the relevant science to support their claim that “rabies transmission via feral cats is a particular concern.”

“Feral cat populations,” argue the authors of a recently published paper, “must be reduced and eliminated to manage the public health risk of rabies transmission.” [1] Their solution? “Traditional animal control policies [that] have stressed stray animal control and removal.”

It’s no surprise, given the American Bird Conservancy’s contribution (president George Fenwick is among the paper’s seven co-authors, and Steve Holmer, Bird Conservation Alliance director, is thanked in the acknowledgments for his “review and input during the writing of the manuscript”) that the article provides no evidence whatsoever of such policies and practices reducing the risk of rabies posed by free-roaming cats.

Witch-hunts, after all, have little use for evidence.

But the Centers for Disease Control and Prevention and U.S. Department of Agriculture, representatives of which make up the paper’s other six co-authors,* rely on solid evidence to develop sound public policy.**

Don’t they?

To borrow a line from Ernest HemingwayIsn’t it pretty to think so?

Read more

Serious Public Health Issues? Seriously?

Culex quinquefasciatus mosquito. Photo courtesy of Wikimedia Commons and CDC/Jim Gathany.

“This is a significant study that documents serious wildlife and public health issues associated with 125 million outdoor cats in the United States,” explained the American Bird Conservancy’s vice president for conservation advocacy, Darin Schroeder, in a September 18 press release. [1] Schroeder was referring to a paper (“a review of the various diseases of free-roaming cats and the public health implications associated with the cat populations,” [2] as the authors themselves describe it, not a study) published online in July by the journal Zoonoses Public Health (and to be included in an upcoming print edition).

“The information in this review,” explain Rick Gerhold and David Jessup, the paper’s authors, “highlights the serious public health diseases associated with free-roaming cats and underscores the need for increased public health attention directed towards free-roaming cats.” [2]

I’ll save my critique of “Zoonotic Diseases Associated with Free-Roaming Cats” for next time. And let’s set aside for the moment those alleged wildlife impacts, and ABC’s dubious estimate of the number of outdoor cats in this country. What about ABC’s apparent concern for those “serious public health diseases”? Read more

Downgrading ABC’s “Perfect Storm”


Once again, the American Bird Conservancy is using scare tactics to gain support for their long-standing witch-hunt against free-roaming cats, this time suggesting a connection between TNR and rabies exposure. Data from the Centers for Disease Control and Prevention demonstrate no such connection.

Maybe the folks at the American Bird Conservancy were simply feeling left out, what with all the attention the U.S. Fish and Wildlife Service has been getting for their participation in The Wildlife Society’s upcoming feral cat workshop.

You know, all dressed up (tired talking points in hand) and nowhere to go.

With just a day to spare, ABC announced that senior policy analyst Steve Holmer would be participating in the 2nd Annual World Rabies Day Webinar, apparently using the occasion—as is ABC’s habit—to trot out all the usual anti-TNR propaganda.

According to a media release from ABC, Managed Cat Colonies and Rabies was to be “one of 28 presentations being aired in over 70 countries.” I was unable to tune into Holmer’s presentation, but ABC’s announcement suggests I didn’t miss much: “Feral cat colonies bring together a series of high risk elements that result in a ‘perfect storm’ of rabies exposure.”

Put into context, though, the rabies threat posed by “feral cat colonies” is more of a tempest in a teacup.

ABC, CDC, and TWS
“While cats make up a small percentage of rabies vectors,” argues Holmer, “they are responsible for a disproportionate number of human exposures.” As the media release explains:

According to the Centers for Disease Control and Prevention, most people are exposed to rabies due to close contact with domestic animals such as cats and dogs. Although dogs historically posed a greater rabies threat to humans, dog-related incidents have become less frequent in recent decades, dropping from 1,600 cases in 1958 to just 75 in 2008. Meanwhile, cases involving cats have increased over the same period with spikes of up to 300 cases in a single year.

Here, ABC is, once again, not telling us the whole story—beginning with their source. It turns out this paragraph—along with other portions of their release—were lifted verbatim from The Wildlife Society’s Rabies in Humans and Wildlife “fact sheet” (PDF). TWS attributes the figures to a 2009 report of CDC data published in the Journal of the American Veterinary Medical Association (which includes the graph below).

“State health authorities have different requirements for submission of specimens for rabies testing,” note the authors, “therefore, intensity of surveillance varies.” [1]

“Because most animals submitted for testing are selected because of abnormal behavior or obvious signs of illness, percentages of tested animals with positive results in the present report are not representative of the incidence of rabies in the general population. Further, because of differences in protocols and submission rates among species and states, comparison of percentages of animals with positive results between species or states is inappropriate.” [1, italics mine]

Comparing rabies cases in dogs and cats, as TWS—and, by extension, ABC—have done, misrepresents the actual threat posed by cats. Indeed, as “Rabies surveillance in the United States during 2009” makes clear (see table below), no human case of rabies reported between 2000 and 2009 was linked to a cat.

As one of my colleagues astutely observed, “You are more likely to be executed by Rick Perry than die from rabies contracted from a cat.”

[Note: As I’ve demonstrated previously, TWS’s “fact sheets” aren’t any better than ABC’s media releases when it comes to, well, facts. In Rabies in Humans and Wildlife, TWS suggests that treatment for people exposed to rabies “can cost $7,000 or more; every year, the United States spends approximately $300 million on rabies prevention.” [2]

Among the sources cited by TWS is the CDC—which paints a very different economic picture, suggesting that “a course of rabies immune globulin and five doses of vaccine given over a 4-week period typically exceeds $1,000,” and pointing out that the annual expenditures for rabies prevention “include the vaccination of companion animals, animal control programs, maintenance of rabies laboratories, and medical costs, such as those incurred for rabies postexposure prophylaxis.”

If ABC isn’t going to do their own homework, then they should at least look for a trustworthy source.]

TNR: Barrier to Rabies Transmission
“Managed colonies teach feral cats to associate with humans,” says Holmer/TWS, “and while most people will not interact with wildlife, especially animals displaying erratic behavior, cats are perceived as domestic and approachable.”

In an e-mail to me earlier this week, Merritt Clifton editor of Animal People, dismissed several of Holmer’s assertions, describing TNR as “a very useful tool in fighting rabies.”

“Neuter/return feral cat population control, including vaccination, is in truth a very effective rabies control measure, as I know firsthand, because I was personally involved in the introduction of neuter/return feral cat control to the U.S. in 1991–1992—and it was done as part of a rabies control program.”

“The idea,” says Clifton, “was to see whether neuter/return could turn the feral cat population into a vaccinated barrier between rabid raccoons and free-roaming pet cats.”

“As coordinator of a rabies information hotline for the preceding year, following the arrival in Connecticut of the mid-Atlantic raccoon rabies pandemic, I became one of the three coordinators of an experiment which sterilized and vaccinated 330 feral cats at eight locations in northern Fairfield County, Connecticut.”

The experiment was, Clifton explains, a success. “The only rabid cat ever found near our eight working locations,” he says, “was an unvaccinated house cat who was not normally allowed outside, but escaped and fought with a raccoon before being captured by [a] Town of Monroe animal control officer.” Clifton and his colleagues were, he tells me, “honored by the Town of Monroe Police Department for our accomplishment in keeping rabies from spreading beyond raccoons. The certificate is above my desk right now.”

“To date,” Clifton continues, “there has never been even one case of rabies in the U.S. among cats who were part of a managed neuter/return program, coordinated with a humane society or animal control agency. Of the 32 instances of rabid cats in the U.S. reported by ProMed since 2005, 11 involved feral cats, and several others involved found kittens [and] cats of indeterminate status, but none were part of a neuter return/program.”

[Note: The apparent discrepancy between CDC and ProMed figures are, Clifton tells me, easily explained: “ProMed reports outbreaks, not individual cases.”]

Vaccinations
For Holmer, incorporating the rabies vaccine into standard TNR protocol—as is done in many locations—is insufficient.

“Even when they are vaccinated when first trapped, re-trapping cats to revaccinate can be problematic as the cats become wary of the traps. There is also typically not the funding or infrastructure among the colony feeders to repeatedly re-trap cats to administer vaccines.”

In fact, boosters are probably unnecessary. Julie Levy, Maddie’s Professor of Shelter Medicine at the University of Florida’s College of Veterinary Medicine—and one of this country’s foremost experts on feral cats—suggests, “Even a single dose of rabies vaccination provides years of protection against rabies infection.”

When it comes right down to it, initial vaccinations are probably unnecessary, too, in much of the country. As the authors of the 2009 rabies surveillance report—referring to the map shown below—point out, “Most (81.0 percent) of the 300 cases of rabies involving cats were reported from states where raccoon rabies is enzootic, with two states (Pennsylvania and Virginia) accounting for nearly a third of all rabid cats reported during 2009.” [3]

If ABC is truly concerned about the public health threat posed by “feral cat colonies,” why withhold such critical information? Because their “perfect storm” media release has nothing whatsoever to do public health. Or science, for that matter. It’s just another feeble attempt to gain support for their long-standing witch-hunt against free-roaming cats.

And to add to the fear-mongering, ABC now suggests that TNR actually increases the number of stray, abandoned, and feral cats.

“Peer reviewed studies have shown that over time, cat colonies increase in size, the result of the inability to neuter or spay all the cats and the dumping of unwanted cats at the colony sites by callous pet owners. The result is a large number of unvaccinated cats.”

Just 10 months ago, though, ABC was telling a rather different story. Authors of The American Bird Conservancy Guide to Bird Conservation suggest, “few colonies managed under this system shrink.” [4] Either way, ABC is ignoring compelling evidence that TNR can indeed reduce colony size over time—in some cases 16–32 percent, [5] 36 percent, [6] and 66 percent. [7]

•     •     •

“The increase in the cases of human rabies exposure from feral cats,” argues Holmer, “should be a concern to city and other government officials.”

“This problem will only get worse as managed feral cat colonies grow in number because half truths about their impacts and implications on local communities and the environment is accepted by decision makers who mistakenly believe they are receiving full disclosure.”

If Holmer’s looking for half-truths and partial disclosures, he needn’t look any further than ABC’s most recent piece of propaganda—the most insidious element of which is merely implied. One might easily get the impression that ABC has a plan to reduce the population of stray, abandoned, and feral cats—a feasible alternative to TNR.

In fact, there is no such plan.

That’s ABC’s dirty little secret (one they share with TWS and USFWS). And that’s what should be a concern to city and other government officials.

Literature Cited
1. Blanton, J.D., et al., “Rabies surveillance in the United States during 2008.” Journal of the American Veterinary Medical Association. 2009. 235(6): p. 676–689. www.avma.org/avmacollections/rabies/javma_235_6_676.pdf

2. n.a., Problems with Trap-Neuter-Release. 2011, The Wildlife Society: Bethesda, MD. http://joomla.wildlife.org/documents/cats_tnr.pdf

3. Blanton, J.D., Palmer, D., and Rupprecht, C.E., “Rabies surveillance in the United States during 2009.” Journal of the American Veterinary Medical Association. 2010. 237(6): p. 646–657. http://avmajournals.avma.org/doi/pdf/10.2460/javma.237.6.646

4. Lebbin, D.J., Parr, M.J., and Fenwick, G.H., The American Bird Conservancy Guide to Bird Conservation. 2010, London: University of Chicago Press.

5. Natoli, E., et al., “Management of feral domestic cats in the urban environment of Rome (Italy).” Preventive Veterinary Medicine. 2006. 77(3-4): p. 180–185. http://www.sciencedirect.com/science/article/B6TBK-4M33VSW-1/2/0abfc80f245ab50e602f93060f88e6f9

www.kiccc.org.au/pics/FeralCatsRome2006.pdf

6. Nutter, F.B., Evaluation of a Trap-Neuter-Return Management Program for Feral Cat Colonies: Population Dynamics, Home Ranges, and Potentially Zoonotic Diseases, in Comparative Biomedical Department. 2005, North Carolina State University: Raleigh, NC. p. 224. http://www.carnivoreconservation.org/files/thesis/nutter_2005_phd.pdf

7. Levy, J.K., Gale, D.W., and Gale, L.A., “Evaluation of the effect of a long-term trap-neuter-return and adoption program on a free-roaming cat population.” Journal of the American Veterinary Medical Association. 2003. 222(1): p. 42-46. http://avmajournals.avma.org/doi/abs/10.2460/javma.2003.222.42

8. Yoshino, K. (2010, January 17). A catfight over neutering program. Los Angeles Times, from http://www.latimes.com/news/local/la-me-feral-cats17-2010jan17,0,1225635.story